Table 1.
Surveillance results of environmental AIVs in Fujian Province, during 2013–2017
| Influenza A virus | H5 subtype | |||||||
|---|---|---|---|---|---|---|---|---|
| Number of samples | Number of positive (%) | P-value | χ 2 | Number of positive (%) | P-value | χ 2 | ||
| Surveillance city | Fuzhou | 819 |
157 (19.17) |
<0.001 | 540.835 |
7 (0.85) |
<0.001 | 101.033 |
| Xiamen | 1060 |
594 (56.04) |
63 (5.94) |
|||||
| Quanzhou | 1234 |
369 (29.90) |
51 (4.13) |
|||||
| Zhangzhou | 589 |
33 (5.60) |
1 (0.17) |
|||||
| Sanming | 600 |
219 (36.50) |
59 (9.83) |
|||||
| Nanping | 601 |
193 (32.11) |
27 (4.49) |
|||||
| Sample site | LPMs | 3785 |
1500 (39.63) |
<0.001* |
199 (5.26) |
<0.001* | ||
| Poultry farms | 275 |
1 (0.36) |
0 (0.00) |
|||||
| Poultry households | 701 |
48 (6.85) |
4 (0.57) |
|||||
| Poultry slaughter factories | 133 |
16 (12.03) |
5 (3.76) |
|||||
| Others | 9 |
0 (0.00) |
0 (0.00) |
|||||
| Sample | Fresh fecal | 1696 |
477 (28.13) |
<0.001* |
55 (3.24) |
<0.001* | ||
| Cage surface | 1245 |
401 (32.21) |
35 (2.81) |
|||||
| Poultry drinking water | 788 |
252 (31.98) |
39 (4.95) |
|||||
| Cleaning poultry sewage | 635 |
249 (39.21) |
38 (5.98) |
|||||
| Poultry chopping board surface | 535 |
184 (34.39) |
41 (7.66) |
|||||
| Others | 4 |
2 (50.00) |
0 (0.00) |
|||||
| Season | Spring | 1448 |
555 (38.33) |
<0.001 | 90.916 |
78 (5.39) |
<0.001 | 48.174 |
| Summer | 1060 |
284 (26.79) |
20 (1.89) |
|||||
| Autumn | 975 |
218 (22.36) |
19 (1.95) |
|||||
| Winter | 1420 |
508 (35.77) |
91 (6.41) |
|||||
| Total | 4903 |
1565 (31.92) |
208 (4.24) |
|||||
*P value counted by Fisher’s exact probability